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Will Deacon 48c3538c35 arm64: entry: Apply BP hardening for suspicious interrupts from EL0 
Commit 30d88c0e3a upstream.

It is possible to take an IRQ from EL0 following a branch to a kernel
address in such a way that the IRQ is prioritised over the instruction
abort. Whilst an attacker would need to get the stars to align here,
it might be sufficient with enough calibration so perform BP hardening
in the rare case that we see a kernel address in the ELR when handling
an IRQ from EL0.

Reported-by: Dan Hettena <dhettena@nvidia.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2018-02-16 20:22:53 +01:00
arch arm64: entry: Apply BP hardening for suspicious interrupts from EL0 2018-02-16 20:22:53 +01:00
block block: don't let passthrough IO go into .make_request_fn() 2018-01-02 20:31:05 +01:00
certs License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
crypto crypto: tcrypt - fix S/G table for test_aead_speed() 2018-02-13 10:19:49 +01:00
Documentation arm64: cpu_errata: Add Kryo to Falkor 1003 errata 2018-02-16 20:22:48 +01:00
drivers drivers/firmware: Expose psci_get_version through psci_ops structure 2018-02-16 20:22:53 +01:00
firmware License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fs CIFS: zero sensitive data when freeing 2018-02-16 20:22:43 +01:00
include drivers/firmware: Expose psci_get_version through psci_ops structure 2018-02-16 20:22:53 +01:00
init bpf: introduce BPF_JIT_ALWAYS_ON config 2018-01-31 14:03:49 +01:00
ipc License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
kernel sched/rt: Up the root domain ref count when passing it around via IPIs 2018-02-16 20:22:44 +01:00
lib test_firmware: fix missing unlock on error in config_num_requests_store() 2018-02-03 17:39:24 +01:00
mm Revert "defer call to mem_cgroup_sk_alloc()" 2018-02-13 10:19:48 +01:00
net dccp: CVE-2017-8824: use-after-free in DCCP code 2018-02-16 20:22:45 +01:00
samples samples/bpf: adjust rlimit RLIMIT_MEMLOCK for xdp1 2017-12-20 10:10:31 +01:00
scripts kbuild: rpm-pkg: keep spec file until make mrproper 2018-02-13 10:19:46 +01:00
security ima/policy: fix parsing of fsuuid 2018-02-03 17:38:53 +01:00
sound ASoC: pcm512x: add missing MODULE_DESCRIPTION/AUTHOR/LICENSE 2018-02-07 11:12:20 -08:00
tools objtool: Warn on stripped section symbol 2018-02-07 11:12:21 -08:00
usr initramfs: fix initramfs rebuilds w/ compression after disabling 2017-11-03 07:39:19 -07:00
virt arm64: KVM: Use per-CPU vector when BP hardening is enabled 2018-02-16 20:22:53 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Add hch to .get_maintainer.ignore 2015-08-21 14:30:10 -07:00
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore kbuild: rpm-pkg: keep spec file until make mrproper 2018-02-13 10:19:46 +01:00
.mailmap .mailmap: Add Maciej W. Rozycki's Imagination e-mail address 2017-11-10 12:16:15 -08:00
COPYING [PATCH] update FSF address in COPYING 2005-09-10 10:06:29 -07:00
CREDITS MAINTAINERS: update TPM driver infrastructure changes 2017-11-09 17:58:40 -08:00
Kbuild License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kconfig License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
MAINTAINERS Merge branch 'akpm' (patches from Andrew) 2017-11-09 18:26:51 -08:00
Makefile Linux 4.14.19 2018-02-13 10:19:50 +01:00
README README: add a new README file, pointing to the Documentation/ 2016-10-24 08:12:35 -02:00

README 

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.